Six days may work be
done; but in the seventh is the Sabbath of rest, holy to the Lord: whosoever
does any work in the Sabbath day, he shall surely be put to death. (Exodus
31:15)

In the Noble Qur’ān,
however, the Sabbath is not reinforced. The Torah clearly states that it is
a sign between God and the Israelites forever (as well as Passover), yet
this is not stated in the Qur’ān. Why is Sabbath not the Muslims?

Answer:

Sabbath, no doubt,
is a day of great importance but for the Israelites as you have mentioned.
Allah declared for each nation a special day in order to distinguish them
from others and to give them a feeling of personal relationship with Allah.
This relationship they experience on the day appointed divinely for them.

As far as the Muslims are
concerned, the Prophet (sws) has given importance to Friday. On this day,
they proclaim the greatness of Allah in large gatherings as compared to
normal congregation for other obligatory prayers. This difference is same as
the difference of ‘Eīd (feast) days. Muslims celebrate and enjoy feasts on
days different from those appointed for the People of the Book. Thus, there
was no need to reinforce the importance of Sabbath in the Holy Qur’ān.